Unity3D :使圆柱体从一个点延伸到另一点
Unity3D :使圆柱体从一个点延伸到另一点
提问于 2015-12-05 22:37:00
我希望，在每一个框架中，移动，缩放和旋转一个给定的圆柱，使它的行为就像两点之间的“绳子”。
我现在有这段代码，但它根本不像预期的那样工作：
hook.transform.position = (rightHandPosition + hookDestination)/2;
hook.transform.localScale = new Vector3(0.5F, Vector3.Magnitude(hookDestination - rightHandPosition), 0.5F);
hook.transform.rotation = Quaternion.Euler(hookDestination - rightHandPosition);你可以猜到这两点是rightHandPosition和hookDestination。目前，圆柱体在“随机”位置产卵，具有“随机”旋转和巨大的尺度。
我怎么才能修好它？
“完整”剧本：
public class FirstPersonController : MonoBehaviour {
public GameObject hook;
bool isHooked = false;
Vector3 hookDestination;
Vector3 rightHandPosition;
void Start() {
hook.renderer.enabled = false;
rightHandPosition = hook.transform.position;
}
// Update is called once per frame
void Update () {
if (isHooked) {
hook.transform.position = (rightHandPosition + hookDestination)/2;
hook.transform.localScale = new Vector3(0.5F, Vector3.Magnitude(hookDestination - rightHandPosition), 0.5F);
hook.transform.rotation = Quaternion.Euler(hookDestination - rightHandPosition);
}
if (isHooked && !Input.GetMouseButton(1)) {
isHooked = false;
hook.renderer.enabled = false;
}
if (Input.GetMouseButtonDown (1) && !isHooked) {
Ray ray = GameObject.FindGameObjectWithTag ("MainCamera").camera.ViewportPointToRay (new Vector3 (0.5F, 0.5F, 0));
RaycastHit hit;
if (Physics.Raycast (ray, out hit) && hit.distance < 5000000 && hit.collider.tag != "Player") {
isHooked = true;
hookDestination = hit.point;
hook.renderer.enabled = true;
}
}
}
}现场截图：
回答 2
Stack Overflow用户
回答已采纳
发布于 2015-12-16 21:04:09
fafase的评论是正确的答案:使用LineRenderer。
hookRender.SetPosition(0, rightHandPosition);
hookRender.SetPosition(1, hookDestination);Stack Overflow用户
发布于 2018-05-30 11:54:38
让我们假设cubeStart是起点，cubeEnd是终点。“汽缸”就是你的汽缸
using System.Collections;
using System.Collections.Generic;
using UnityEngine;
public class AlignCyl : MonoBehaviour {
GameObject cubeStart;
GameObject cubeEnd;
GameObject cylinder;
Vector3 endV;
Vector3 startV;
Vector3 rotAxisV;
Vector3 dirV;
Vector3 cylDefaultOrientation = new Vector3(0,1,0);
float dist;
// Use this for initialization
void Start () {
cubeStart = GameObject.Find("CubeStart");
cubeEnd = GameObject.Find("CubeEnd");
cylinder = GameObject.Find("Cylinder");
endV = cubeEnd.transform.position;
startV = cubeStart.transform.position;
}
// Update is called once per frame
void Update () {
// Position
cylinder.transform.position = (endV + startV)/2.0F;
// Rotation
dirV = Vector3.Normalize(endV - startV);
rotAxisV = dirV + cylDefaultOrientation;
rotAxisV = Vector3.Normalize(rotAxisV);
cylinder.transform.rotation = new Quaternion(rotAxisV.x, rotAxisV.y, rotAxisV.z, 0);
// Scale
dist = Vector3.Distance(endV, startV);
cylinder.transform.localScale = new Vector3(1, dist/2, 1);
}
}用Unity3D 2018.1测试，我关于旋转的概念完全是基于四元数的。
x=rotAxis.x * sin(angle/2) = rotAxis.x;
y=rotAxis.y * sin(angle/2) = rotAxis.y;
z=rotAxis.z * sin(angle/2) = rotAxis.z;
w = cos(angle/2) = 0;其中rotAxis是两个向量之和，即默认的圆柱方向和所需的方向。角度是180度，因为我们希望圆柱体绕rotAxis旋转180度。这是四元数旋转(绕轴旋转)的定义。
页面原文内容由Stack Overflow提供。腾讯云小微IT领域专用引擎提供翻译支持
原文链接：
https://stackoverflow.com/questions/34111745
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